Electrical issues/broken earth cable

[dellyz]

Hello, lately ive been having strange electrical issues on my 09 C230:
Flickering cabin lights when first opening the door ( not when manually turning them on )
Strange static/crackling sound coming from front driver side speaker only ( others are fine )
Driver side turn signal will work for about 3-5 seconds initially, then the signal will blink rapidly and stop working ( in order to get the turn signal to work again for that 3-5 seconds i have to turn the car off and on )
Driver side emergency flasher does not work
Driver side parking light does not work
Passenger side parking light would not turn off until battery dead ( had to remove bulb )
Parasitic drain ( battery dead if not driven for 2 days )
Check engine light

Yesterday i saw this earth cable was broken





Could this grounding wire be the cause of those electrical issues?



Thank you

 

[Blobcat]

That cable is also pretty corroded so won't give a good earth (even when connected...)

 

[ajlsl600]

So much electric, electronics batts and connections of far more important than of old.

 

[Craiglxviii]

Quite likely to contribute to many problems yes.